I couldn't honestly say what i would or wouldn't find humiliating, so many factors influence it, the situation, the people present, my mood on the day....Your "favourite" would probably do the tricki would find that pretty challenging...
The thing that really 'does it' for me, is pleasing my Master, so if He wished to humiliate me, i would be greatly aroused by the fact i was pleasing Him, but, no, i don't deliberately put myself in situations to achieve humiliation, so i guess that means its not something that, in itself, i enjoy.
nikki